Nikon's tiny 6.1MP DSLR that proved simplicity and large photosites could produce genuinely satisfying images.
The Nikon D40 was released in November 2006 as Nikon's entry-level APS-C DSLR, notable as the first Nikon DSLR body without an internal AF drive motor. This design decision reduced size and cost but meant that only lenses with their own AF motor (AF-S, AF-I) could autofocus on the body — the large library of older Nikon screwdrive AF-D lenses could only be used in manual focus mode. At 524g it was the lightest Nikon DSLR at its launch. The 6.1MP CCD sensor was the standard entry-tier specification of the era.
The 6.1MP DX-format CCD sensor pairs with the Expeed processor. The 11-point AF system provides standard subject acquisition on compatible lenses. Burst shooting runs at 2.5fps. No video recording. No internal AF drive motor — AF-S and AF-I lenses autofocus; screwdrive AF-D lenses mount and meter but require manual focus. Battery life approximately 470 shots using the EN-EL9, body weight approximately 524g with battery and card, single SD/SDHC card slot.
The D40's elimination of the AF drive motor established a precedent that Nikon continued through the D40x, D60, and the D3xxx/D5xxx lines: these entry bodies prioritise compactness and cost over legacy AF-D lens compatibility. For photographers entering the Nikon system with modern AF-S kit lenses, the D40 provides full autofocus capability. The 6.1MP CCD provides standard image quality for print up to A4 and standard web sharing use cases.
On the used market the D40 is very affordable as one of the lightest vintage Nikon DSLRs. Condition checks: shutter count via EXIF — rated 50,000 actuations — EN-EL9 battery health (specific to the D40/D40x/D60, not shared with later EN-EL14 series), and single SD slot. Confirm that target lenses are AF-S or AF-I before purchase; older AF-D screwdrive lenses require manual focus. Compatible with all Nikon F-mount AF-S and AF-I lenses for autofocus.